I'm installing a prosport A/F gauge in my 05 WRX and I need to know which wire out of the ecu to tap into. I tried the one that a pinout online told me to use but it was a lie... I know that it wont be accurate and I know that it will merely be a light show on my dash. Right now it is just pinned at 10.0 and I kind of want it to be a light show at this point haha. So which wire? Thanks.